Nine years after high school, Myeong meets his first love, Seonho, at a class reunion. Overwhelmed by unresolved feelings, Myeong steps outside for air, but Seonho follows him into the quiet darkness. As the distance between them collapses, unspoken desires and buried memories resurface, carrying them straight back to the dazzling, suffocating summer they spent together at eighteen.

In the gritty, neon-lit backalleys of central Seoul, a vampire hides in plain sight. Mignon survives a brutal double life: a mechanic by day and an underground cage fighter by night. Trapped in a cycle of violence, his only solace is Dr. Oh, the mysterious ringside doctor who watches over him. But when Mignon witnesses the doctor’s bloodthirsty secret, instead of running, he offers himself up completely. As their dark bond deepens, Mignon dangerous reality threatens to drag them both into hell.